Schema and Namespace Oid confusion - Mailing list pgsql-admin

From ZongtianHou
Subject Schema and Namespace Oid confusion
Date
Msg-id 860D4620-5D8C-4D24-991B-6B18F2BC94A5@icloud.com
Whole thread Raw
Responses Re: Schema and Namespace Oid confusion  (Alvaro Herrera <alvherre@2ndquadrant.com>)
Re: Schema and Namespace Oid confusion  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-admin
Hi, everyone

I get somehow confused when I learn about namespace here, there are two questions,
First, what is the difference between namespace and schema?
Second, why the Oid of public namespace is 2200, the same between databases? Does oid is unique for every object across
cluster? 

Does someone know about these clearly?

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